Disable configuration option not supported by nose.

$OpenBSD: patch-setup_cfg,v 1.3 2016/09/02 09:57:44 edd Exp $
--- setup.cfg.orig	Tue May  4 07:50:47 2010
+++ setup.cfg	Tue May  4 07:50:49 2010
@@ -5,6 +5,6 @@ tag_svn_revision = 0
 
 [nosetests]
 exclude = ^examples
-first-package-wins = true
+#first-package-wins = true
 with-sqlalchemy = true
 
